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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-12-26 16:00:37 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-12-26 16:00:37 -0300
commit35acfa0fc609f2a2cd95cef4a6a9c3a5c38f1778 (patch)
tree281fc9db2a40c54ee94dc88fc2bf8c119cfafc15 /fs/exfat/exfat_super.c
parentf3a16ba6a1152b8966dcadc668af4cf00623c7b1 (diff)
Add support for the exFAT file system, fix hangs on older intel hardware and update AUFSpck-4.3.3-gnu
Diffstat (limited to 'fs/exfat/exfat_super.c')
-rw-r--r--fs/exfat/exfat_super.c2600
1 files changed, 2600 insertions, 0 deletions
diff --git a/fs/exfat/exfat_super.c b/fs/exfat/exfat_super.c
new file mode 100644
index 000000000..a003a7212
--- /dev/null
+++ b/fs/exfat/exfat_super.c
@@ -0,0 +1,2600 @@
+/* Some of the source code in this file came from "linux/fs/fat/file.c","linux/fs/fat/inode.c" and "linux/fs/fat/misc.c". */
+/*
+ * linux/fs/fat/file.c
+ *
+ * Written 1992,1993 by Werner Almesberger
+ *
+ * regular file handling primitives for fat-based filesystems
+ */
+
+/*
+ * linux/fs/fat/inode.c
+ *
+ * Written 1992,1993 by Werner Almesberger
+ * VFAT extensions by Gordon Chaffee, merged with msdos fs by Henrik Storner
+ * Rewritten for the constant inumbers support by Al Viro
+ *
+ * Fixes:
+ *
+ * Max Cohan: Fixed invalid FSINFO offset when info_sector is 0
+ */
+
+/*
+ * linux/fs/fat/misc.c
+ *
+ * Written 1992,1993 by Werner Almesberger
+ * 22/11/2000 - Fixed fat_date_unix2dos for dates earlier than 01/01/1980
+ * and date_dos2unix for date==0 by Igor Zhbanov(bsg@uniyar.ac.ru)
+ */
+
+/*
+ * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/time.h>
+#include <linux/slab.h>
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37)
+#include <linux/smp_lock.h>
+#endif
+#include <linux/seq_file.h>
+#include <linux/pagemap.h>
+#include <linux/mpage.h>
+#include <linux/buffer_head.h>
+#include <linux/exportfs.h>
+#include <linux/mount.h>
+#include <linux/vfs.h>
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
+#include <linux/aio.h>
+#endif
+#include <linux/parser.h>
+#include <linux/uio.h>
+#include <linux/writeback.h>
+#include <linux/log2.h>
+#include <linux/hash.h>
+#include <linux/backing-dev.h>
+#include <linux/sched.h>
+#include <linux/fs_struct.h>
+#include <linux/namei.h>
+#include <asm/current.h>
+#include <asm/unaligned.h>
+
+#include "exfat_version.h"
+#include "exfat_config.h"
+#include "exfat_data.h"
+#include "exfat_oal.h"
+
+#include "exfat_blkdev.h"
+#include "exfat_cache.h"
+#include "exfat_nls.h"
+#include "exfat_api.h"
+#include "exfat_core.h"
+
+#include "exfat_super.h"
+
+static struct kmem_cache *exfat_inode_cachep;
+
+static int exfat_default_codepage = CONFIG_EXFAT_DEFAULT_CODEPAGE;
+static char exfat_default_iocharset[] = CONFIG_EXFAT_DEFAULT_IOCHARSET;
+
+extern struct timezone sys_tz;
+
+#define CHECK_ERR(x) BUG_ON(x)
+
+#define UNIX_SECS_1980 315532800L
+
+#if BITS_PER_LONG == 64
+#define UNIX_SECS_2108 4354819200L
+#endif
+/* days between 1.1.70 and 1.1.80 (2 leap days) */
+#define DAYS_DELTA_DECADE (365 * 10 + 2)
+/* 120 (2100 - 1980) isn't leap year */
+#define NO_LEAP_YEAR_2100 (120)
+#define IS_LEAP_YEAR(y) (!((y) & 0x3) && (y) != NO_LEAP_YEAR_2100)
+
+#define SECS_PER_MIN (60)
+#define SECS_PER_HOUR (60 * SECS_PER_MIN)
+#define SECS_PER_DAY (24 * SECS_PER_HOUR)
+
+#define MAKE_LEAP_YEAR(leap_year, year) \
+ do { \
+ if (unlikely(year > NO_LEAP_YEAR_2100)) \
+ leap_year = ((year + 3) / 4) - 1; \
+ else \
+ leap_year = ((year + 3) / 4); \
+ } while (0)
+
+/* Linear day numbers of the respective 1sts in non-leap years. */
+static time_t accum_days_in_year[] = {
+ /* Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec */
+ 0, 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0,
+};
+
+static void _exfat_truncate(struct inode *inode, loff_t old_size);
+
+/* Convert a FAT time/date pair to a UNIX date (seconds since 1 1 70). */
+void exfat_time_fat2unix(struct exfat_sb_info *sbi, struct timespec *ts,
+ DATE_TIME_T *tp)
+{
+ time_t year = tp->Year;
+ time_t ld;
+
+ MAKE_LEAP_YEAR(ld, year);
+
+ if (IS_LEAP_YEAR(year) && (tp->Month) > 2)
+ ld++;
+
+ ts->tv_sec = tp->Second + tp->Minute * SECS_PER_MIN
+ + tp->Hour * SECS_PER_HOUR
+ + (year * 365 + ld + accum_days_in_year[(tp->Month)] + (tp->Day - 1) + DAYS_DELTA_DECADE) * SECS_PER_DAY
+ + sys_tz.tz_minuteswest * SECS_PER_MIN;
+ ts->tv_nsec = 0;
+}
+
+/* Convert linear UNIX date to a FAT time/date pair. */
+void exfat_time_unix2fat(struct exfat_sb_info *sbi, struct timespec *ts,
+ DATE_TIME_T *tp)
+{
+ time_t second = ts->tv_sec;
+ time_t day, month, year;
+ time_t ld;
+
+ second -= sys_tz.tz_minuteswest * SECS_PER_MIN;
+
+ /* Jan 1 GMT 00:00:00 1980. But what about another time zone? */
+ if (second < UNIX_SECS_1980) {
+ tp->Second = 0;
+ tp->Minute = 0;
+ tp->Hour = 0;
+ tp->Day = 1;
+ tp->Month = 1;
+ tp->Year = 0;
+ return;
+ }
+#if (BITS_PER_LONG == 64)
+ if (second >= UNIX_SECS_2108) {
+ tp->Second = 59;
+ tp->Minute = 59;
+ tp->Hour = 23;
+ tp->Day = 31;
+ tp->Month = 12;
+ tp->Year = 127;
+ return;
+ }
+#endif
+ day = second / SECS_PER_DAY - DAYS_DELTA_DECADE;
+ year = day / 365;
+ MAKE_LEAP_YEAR(ld, year);
+ if (year * 365 + ld > day)
+ year--;
+
+ MAKE_LEAP_YEAR(ld, year);
+ day -= year * 365 + ld;
+
+ if (IS_LEAP_YEAR(year) && day == accum_days_in_year[3]) {
+ month = 2;
+ } else {
+ if (IS_LEAP_YEAR(year) && day > accum_days_in_year[3])
+ day--;
+ for (month = 1; month < 12; month++) {
+ if (accum_days_in_year[month + 1] > day)
+ break;
+ }
+ }
+ day -= accum_days_in_year[month];
+
+ tp->Second = second % SECS_PER_MIN;
+ tp->Minute = (second / SECS_PER_MIN) % 60;
+ tp->Hour = (second / SECS_PER_HOUR) % 24;
+ tp->Day = day + 1;
+ tp->Month = month;
+ tp->Year = year;
+}
+
+static struct inode *exfat_iget(struct super_block *sb, loff_t i_pos);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36)
+static int exfat_generic_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg);
+#else
+static long exfat_generic_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
+#endif
+static int exfat_sync_inode(struct inode *inode);
+static struct inode *exfat_build_inode(struct super_block *sb, FILE_ID_T *fid, loff_t i_pos);
+static void exfat_detach(struct inode *inode);
+static void exfat_attach(struct inode *inode, loff_t i_pos);
+static inline unsigned long exfat_hash(loff_t i_pos);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,34)
+static int exfat_write_inode(struct inode *inode, int wait);
+#else
+static int exfat_write_inode(struct inode *inode, struct writeback_control *wbc);
+#endif
+static void exfat_write_super(struct super_block *sb);
+
+static void __lock_super(struct super_block *sb)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,7,0)
+ lock_super(sb);
+#else
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ mutex_lock(&sbi->s_lock);
+#endif
+}
+
+static void __unlock_super(struct super_block *sb)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,7,0)
+ unlock_super(sb);
+#else
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ mutex_unlock(&sbi->s_lock);
+#endif
+}
+
+static int __is_sb_dirty(struct super_block *sb)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,7,0)
+ return sb->s_dirt;
+#else
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ return sbi->s_dirt;
+#endif
+}
+
+static void __set_sb_clean(struct super_block *sb)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,7,0)
+ sb->s_dirt = 0;
+#else
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ sbi->s_dirt = 0;
+#endif
+}
+
+static int __exfat_revalidate(struct dentry *dentry)
+{
+ return 0;
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,00)
+static int exfat_revalidate(struct dentry *dentry, unsigned int flags)
+#else
+static int exfat_revalidate(struct dentry *dentry, struct nameidata *nd)
+#endif
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,00)
+ if (flags & LOOKUP_RCU)
+ return -ECHILD;
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(3,0,00)
+ if (nd && nd->flags & LOOKUP_RCU)
+ return -ECHILD;
+#endif
+
+ if (dentry->d_inode)
+ return 1;
+ return __exfat_revalidate(dentry);
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,00)
+static int exfat_revalidate_ci(struct dentry *dentry, unsigned int flags)
+#else
+static int exfat_revalidate_ci(struct dentry *dentry, struct nameidata *nd)
+#endif
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,00)
+ if (flags & LOOKUP_RCU)
+ return -ECHILD;
+#else
+ unsigned int flags;
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,0,00)
+ if (nd && nd->flags & LOOKUP_RCU)
+ return -ECHILD;
+#endif
+
+ flags = nd ? nd->flags : 0;
+#endif
+
+ if (dentry->d_inode)
+ return 1;
+
+ if (!flags)
+ return 0;
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,0,00)
+ if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
+ return 0;
+#else
+ if (!(nd->flags & (LOOKUP_CONTINUE | LOOKUP_PARENT))) {
+ if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
+ return 0;
+ }
+#endif
+
+ return __exfat_revalidate(dentry);
+}
+
+static unsigned int __exfat_striptail_len(unsigned int len, const char *name)
+{
+ while (len && name[len - 1] == '.')
+ len--;
+ return len;
+}
+
+static unsigned int exfat_striptail_len(const struct qstr *qstr)
+{
+ return __exfat_striptail_len(qstr->len, qstr->name);
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,11,0)
+static int exfat_d_hash(const struct dentry *dentry, struct qstr *qstr)
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38)
+static int exfat_d_hash(struct dentry *dentry, struct qstr *qstr)
+#else
+static int exfat_d_hash(const struct dentry *dentry, const struct inode *inode,
+ struct qstr *qstr)
+#endif
+{
+ qstr->hash = full_name_hash(qstr->name, exfat_striptail_len(qstr));
+ return 0;
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,11,0)
+static int exfat_d_hashi(const struct dentry *dentry, struct qstr *qstr)
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38)
+static int exfat_d_hashi(struct dentry *dentry, struct qstr *qstr)
+#else
+static int exfat_d_hashi(const struct dentry *dentry, const struct inode *inode,
+ struct qstr *qstr)
+#endif
+{
+ struct super_block *sb = dentry->d_sb;
+ const unsigned char *name;
+ unsigned int len;
+ unsigned long hash;
+
+ name = qstr->name;
+ len = exfat_striptail_len(qstr);
+
+ hash = init_name_hash();
+ while (len--)
+ hash = partial_name_hash(nls_upper(sb, *name++), hash);
+ qstr->hash = end_name_hash(hash);
+
+ return 0;
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,11,0)
+static int exfat_cmpi(const struct dentry *parent, const struct dentry *dentry,
+ unsigned int len, const char *str, const struct qstr *name)
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38)
+static int exfat_cmpi(struct dentry *parent, struct qstr *a, struct qstr *b)
+#else
+static int exfat_cmpi(const struct dentry *parent, const struct inode *pinode,
+ const struct dentry *dentry, const struct inode *inode,
+ unsigned int len, const char *str, const struct qstr *name)
+#endif
+{
+ struct nls_table *t = EXFAT_SB(parent->d_sb)->nls_io;
+ unsigned int alen, blen;
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38)
+ alen = exfat_striptail_len(a);
+ blen = exfat_striptail_len(b);
+#else
+ alen = exfat_striptail_len(name);
+ blen = __exfat_striptail_len(len, str);
+#endif
+ if (alen == blen) {
+ if (t == NULL) {
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38)
+ if (strncasecmp(a->name, b->name, alen) == 0)
+#else
+ if (strncasecmp(name->name, str, alen) == 0)
+#endif
+ return 0;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38)
+ } else if (nls_strnicmp(t, a->name, b->name, alen) == 0)
+#else
+ } else if (nls_strnicmp(t, name->name, str, alen) == 0)
+#endif
+ return 0;
+ }
+ return 1;
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,11,0)
+static int exfat_cmp(const struct dentry *parent, const struct dentry *dentry,
+ unsigned int len, const char *str, const struct qstr *name)
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38)
+static int exfat_cmp(struct dentry *parent, struct qstr *a,
+ struct qstr *b)
+#else
+static int exfat_cmp(const struct dentry *parent, const struct inode *pinode,
+ const struct dentry *dentry, const struct inode *inode,
+ unsigned int len, const char *str, const struct qstr *name)
+#endif
+{
+ unsigned int alen, blen;
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38)
+ alen = exfat_striptail_len(a);
+ blen = exfat_striptail_len(b);
+#else
+ alen = exfat_striptail_len(name);
+ blen = __exfat_striptail_len(len, str);
+#endif
+ if (alen == blen) {
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38)
+ if (strncmp(a->name, b->name, alen) == 0)
+#else
+ if (strncmp(name->name, str, alen) == 0)
+#endif
+ return 0;
+ }
+ return 1;
+}
+
+static const struct dentry_operations exfat_ci_dentry_ops = {
+ .d_revalidate = exfat_revalidate_ci,
+ .d_hash = exfat_d_hashi,
+ .d_compare = exfat_cmpi,
+};
+
+static const struct dentry_operations exfat_dentry_ops = {
+ .d_revalidate = exfat_revalidate,
+ .d_hash = exfat_d_hash,
+ .d_compare = exfat_cmp,
+};
+
+/*======================================================================*/
+/* Directory Entry Operations */
+/*======================================================================*/
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,11,0)
+static int exfat_readdir(struct file *filp, struct dir_context *ctx)
+#else
+static int exfat_readdir(struct file *filp, void *dirent, filldir_t filldir)
+#endif
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0)
+ struct inode *inode = file_inode(filp);
+#else
+ struct inode *inode = filp->f_path.dentry->d_inode;
+#endif
+ struct super_block *sb = inode->i_sb;
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ FS_INFO_T *p_fs = &(sbi->fs_info);
+ BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info);
+ DIR_ENTRY_T de;
+ unsigned long inum;
+ loff_t cpos;
+ int err = 0;
+
+ __lock_super(sb);
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,11,0)
+ cpos = ctx->pos;
+#else
+ cpos = filp->f_pos;
+#endif
+ /* Fake . and .. for the root directory. */
+ if ((p_fs->vol_type == EXFAT) || (inode->i_ino == EXFAT_ROOT_INO)) {
+ while (cpos < 2) {
+ if (inode->i_ino == EXFAT_ROOT_INO)
+ inum = EXFAT_ROOT_INO;
+ else if (cpos == 0)
+ inum = inode->i_ino;
+ else /* (cpos == 1) */
+ inum = parent_ino(filp->f_path.dentry);
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,11,0)
+ if (!dir_emit_dots(filp, ctx))
+#else
+ if (filldir(dirent, "..", cpos+1, cpos, inum, DT_DIR) < 0)
+#endif
+ goto out;
+ cpos++;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,11,0)
+ ctx->pos++;
+#else
+ filp->f_pos++;
+#endif
+ }
+ if (cpos == 2)
+ cpos = 0;
+ }
+ if (cpos & (DENTRY_SIZE - 1)) {
+ err = -ENOENT;
+ goto out;
+ }
+
+get_new:
+ EXFAT_I(inode)->fid.size = i_size_read(inode);
+ EXFAT_I(inode)->fid.rwoffset = cpos >> DENTRY_SIZE_BITS;
+
+ err = FsReadDir(inode, &de);
+ if (err) {
+ /* at least we tried to read a sector
+ * move cpos to next sector position (should be aligned)
+ */
+ if (err == FFS_MEDIAERR) {
+ cpos += 1 << p_bd->sector_size_bits;
+ cpos &= ~((1 << p_bd->sector_size_bits)-1);
+ }
+
+ err = -EIO;
+ goto end_of_dir;
+ }
+
+ cpos = EXFAT_I(inode)->fid.rwoffset << DENTRY_SIZE_BITS;
+
+ if (!de.Name[0])
+ goto end_of_dir;
+
+ if (!memcmp(de.ShortName, DOS_CUR_DIR_NAME, DOS_NAME_LENGTH)) {
+ inum = inode->i_ino;
+ } else if (!memcmp(de.ShortName, DOS_PAR_DIR_NAME, DOS_NAME_LENGTH)) {
+ inum = parent_ino(filp->f_path.dentry);
+ } else {
+ loff_t i_pos = ((loff_t) EXFAT_I(inode)->fid.start_clu << 32) |
+ ((EXFAT_I(inode)->fid.rwoffset-1) & 0xffffffff);
+
+ struct inode *tmp = exfat_iget(sb, i_pos);
+ if (tmp) {
+ inum = tmp->i_ino;
+ iput(tmp);
+ } else {
+ inum = iunique(sb, EXFAT_ROOT_INO);
+ }
+ }
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,11,0)
+ if (!dir_emit(ctx, de.Name, strlen(de.Name), inum,
+ (de.Attr & ATTR_SUBDIR) ? DT_DIR : DT_REG))
+#else
+ if (filldir(dirent, de.Name, strlen(de.Name), cpos-1, inum,
+ (de.Attr & ATTR_SUBDIR) ? DT_DIR : DT_REG) < 0)
+#endif
+ goto out;
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,11,0)
+ ctx->pos = cpos;
+#else
+ filp->f_pos = cpos;
+#endif
+ goto get_new;
+
+end_of_dir:
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,11,0)
+ ctx->pos = cpos;
+#else
+ filp->f_pos = cpos;
+#endif
+out:
+ __unlock_super(sb);
+ return err;
+}
+
+static int exfat_ioctl_volume_id(struct inode *dir)
+{
+ struct super_block *sb = dir->i_sb;
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ FS_INFO_T *p_fs = &(sbi->fs_info);
+
+ return p_fs->vol_id;
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36)
+static int exfat_generic_ioctl(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
+#else
+static long exfat_generic_ioctl(struct file *filp,
+ unsigned int cmd, unsigned long arg)
+#endif
+{
+#if !(LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36))
+ #if !(LINUX_VERSION_CODE < KERNEL_VERSION(3,18,3))
+ struct inode *inode = filp->f_path.dentry->d_inode;
+ #else
+ struct inode *inode = filp->f_dentry->d_inode;
+ #endif
+#endif
+#ifdef CONFIG_EXFAT_KERNEL_DEBUG
+ unsigned int flags;
+#endif /* CONFIG_EXFAT_KERNEL_DEBUG */
+
+ switch (cmd) {
+ case EXFAT_IOCTL_GET_VOLUME_ID:
+ return exfat_ioctl_volume_id(inode);
+#ifdef CONFIG_EXFAT_KERNEL_DEBUG
+ case EXFAT_IOC_GET_DEBUGFLAGS: {
+ struct super_block *sb = inode->i_sb;
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+
+ flags = sbi->debug_flags;
+ return put_user(flags, (int __user *)arg);
+ }
+ case EXFAT_IOC_SET_DEBUGFLAGS: {
+ struct super_block *sb = inode->i_sb;
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (get_user(flags, (int __user *) arg))
+ return -EFAULT;
+
+ __lock_super(sb);
+ sbi->debug_flags = flags;
+ __unlock_super(sb);
+
+ return 0;
+ }
+#endif /* CONFIG_EXFAT_KERNEL_DEBUG */
+ default:
+ return -ENOTTY; /* Inappropriate ioctl for device */
+ }
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
+static int exfat_file_fsync(struct file *filp, struct dentry *dentry,
+ int datasync)
+#else
+static int exfat_file_fsync(struct file *filp, int datasync)
+#endif
+{
+ struct inode *inode = filp->f_mapping->host;
+ struct super_block *sb = inode->i_sb;
+ int res, err;
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
+ res = simple_fsync(filp, dentry, datasync);
+#else
+ res = generic_file_fsync(filp, datasync);
+#endif
+ err = FsSyncVol(sb, 1);
+
+ return res ? res : err;
+}
+#endif
+
+const struct file_operations exfat_dir_operations = {
+ .llseek = generic_file_llseek,
+ .read = generic_read_dir,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,11,0)
+ .iterate = exfat_readdir,
+#else
+ .readdir = exfat_readdir,
+#endif
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36)
+ .ioctl = exfat_generic_ioctl,
+ .fsync = exfat_file_fsync,
+#else
+ .unlocked_ioctl = exfat_generic_ioctl,
+ .fsync = generic_file_fsync,
+#endif
+};
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,00)
+static int exfat_create(struct inode *dir, struct dentry *dentry, umode_t mode,
+ bool excl)
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0)
+static int exfat_create(struct inode *dir, struct dentry *dentry, umode_t mode,
+ struct nameidata *nd)
+#else
+static int exfat_create(struct inode *dir, struct dentry *dentry, int mode,
+ struct nameidata *nd)
+#endif
+{
+ struct super_block *sb = dir->i_sb;
+ struct inode *inode;
+ struct timespec ts;
+ FILE_ID_T fid;
+ loff_t i_pos;
+ int err;
+
+ __lock_super(sb);
+
+ DPRINTK("exfat_create entered\n");
+
+ ts = CURRENT_TIME_SEC;
+
+ err = FsCreateFile(dir, (u8 *) dentry->d_name.name, FM_REGULAR, &fid);
+ if (err) {
+ if (err == FFS_INVALIDPATH)
+ err = -EINVAL;
+ else if (err == FFS_FILEEXIST)
+ err = -EEXIST;
+ else if (err == FFS_FULL)
+ err = -ENOSPC;
+ else if (err == FFS_NAMETOOLONG)
+ err = -ENAMETOOLONG;
+ else
+ err = -EIO;
+ goto out;
+ }
+ dir->i_version++;
+ dir->i_ctime = dir->i_mtime = dir->i_atime = ts;
+ if (IS_DIRSYNC(dir))
+ (void) exfat_sync_inode(dir);
+ else
+ mark_inode_dirty(dir);
+
+ i_pos = ((loff_t) fid.dir.dir << 32) | (fid.entry & 0xffffffff);
+
+ inode = exfat_build_inode(sb, &fid, i_pos);
+ if (IS_ERR(inode)) {
+ err = PTR_ERR(inode);
+ goto out;
+ }
+ inode->i_version++;
+ inode->i_mtime = inode->i_atime = inode->i_ctime = ts;
+ /* timestamp is already written, so mark_inode_dirty() is unnecessary. */
+
+ dentry->d_time = dentry->d_parent->d_inode->i_version;
+ d_instantiate(dentry, inode);
+
+out:
+ __unlock_super(sb);
+ DPRINTK("exfat_create exited\n");
+ return err;
+}
+
+static int exfat_find(struct inode *dir, struct qstr *qname,
+ FILE_ID_T *fid)
+{
+ int err;
+
+ if (qname->len == 0)
+ return -ENOENT;
+
+ err = FsLookupFile(dir, (u8 *) qname->name, fid);
+ if (err)
+ return -ENOENT;
+
+ return 0;
+}
+
+static int exfat_d_anon_disconn(struct dentry *dentry)
+{
+ return IS_ROOT(dentry) && (dentry->d_flags & DCACHE_DISCONNECTED);
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,00)
+static struct dentry *exfat_lookup(struct inode *dir, struct dentry *dentry,
+ unsigned int flags)
+#else
+static struct dentry *exfat_lookup(struct inode *dir, struct dentry *dentry,
+ struct nameidata *nd)
+#endif
+{
+ struct super_block *sb = dir->i_sb;
+ struct inode *inode;
+ struct dentry *alias;
+ int err;
+ FILE_ID_T fid;
+ loff_t i_pos;
+ u64 ret;
+ mode_t i_mode;
+
+ __lock_super(sb);
+ DPRINTK("exfat_lookup entered\n");
+ err = exfat_find(dir, &dentry->d_name, &fid);
+ if (err) {
+ if (err == -ENOENT) {
+ inode = NULL;
+ goto out;
+ }
+ goto error;
+ }
+
+ i_pos = ((loff_t) fid.dir.dir << 32) | (fid.entry & 0xffffffff);
+ inode = exfat_build_inode(sb, &fid, i_pos);
+ if (IS_ERR(inode)) {
+ err = PTR_ERR(inode);
+ goto error;
+ }
+
+ i_mode = inode->i_mode;
+ if (S_ISLNK(i_mode)) {
+ EXFAT_I(inode)->target = kmalloc(i_size_read(inode)+1, GFP_KERNEL);
+ if (!EXFAT_I(inode)->target) {
+ err = -ENOMEM;
+ goto error;
+ }
+ FsReadFile(dir, &fid, EXFAT_I(inode)->target, i_size_read(inode), &ret);
+ *(EXFAT_I(inode)->target + i_size_read(inode)) = '\0';
+ }
+
+ alias = d_find_alias(inode);
+ if (alias && !exfat_d_anon_disconn(alias)) {
+ CHECK_ERR(d_unhashed(alias));
+ if (!S_ISDIR(i_mode))
+ d_move(alias, dentry);
+ iput(inode);
+ __unlock_super(sb);
+ DPRINTK("exfat_lookup exited 1\n");
+ return alias;
+ } else {
+ dput(alias);
+ }
+out:
+ __unlock_super(sb);
+ dentry->d_time = dentry->d_parent->d_inode->i_version;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38)
+ dentry->d_op = sb->s_root->d_op;
+ dentry = d_splice_alias(inode, dentry);
+ if (dentry) {
+ dentry->d_op = sb->s_root->d_op;
+ dentry->d_time = dentry->d_parent->d_inode->i_version;
+ }
+#else
+ dentry = d_splice_alias(inode, dentry);
+ if (dentry)
+ dentry->d_time = dentry->d_parent->d_inode->i_version;
+#endif
+ DPRINTK("exfat_lookup exited 2\n");
+ return dentry;
+
+error:
+ __unlock_super(sb);
+ DPRINTK("exfat_lookup exited 3\n");
+ return ERR_PTR(err);
+}
+
+static int exfat_unlink(struct inode *dir, struct dentry *dentry)
+{
+ struct inode *inode = dentry->d_inode;
+ struct super_block *sb = dir->i_sb;
+ struct timespec ts;
+ int err;
+
+ __lock_super(sb);
+
+ DPRINTK("exfat_unlink entered\n");
+
+ ts = CURRENT_TIME_SEC;
+
+ EXFAT_I(inode)->fid.size = i_size_read(inode);
+
+ err = FsRemoveFile(dir, &(EXFAT_I(inode)->fid));
+ if (err) {
+ if (err == FFS_PERMISSIONERR)
+ err = -EPERM;
+ else
+ err = -EIO;
+ goto out;
+ }
+ dir->i_version++;
+ dir->i_mtime = dir->i_atime = ts;
+ if (IS_DIRSYNC(dir))
+ (void) exfat_sync_inode(dir);
+ else
+ mark_inode_dirty(dir);
+
+ clear_nlink(inode);
+ inode->i_mtime = inode->i_atime = ts;
+ exfat_detach(inode);
+ remove_inode_hash(inode);
+
+out:
+ __unlock_super(sb);
+ DPRINTK("exfat_unlink exited\n");
+ return err;
+}
+
+static int exfat_symlink(struct inode *dir, struct dentry *dentry, const char *target)
+{
+ struct super_block *sb = dir->i_sb;
+ struct inode *inode;
+ struct timespec ts;
+ FILE_ID_T fid;
+ loff_t i_pos;
+ int err;
+ u64 len = (u64) strlen(target);
+ u64 ret;
+
+ __lock_super(sb);
+
+ DPRINTK("exfat_symlink entered\n");
+
+ ts = CURRENT_TIME_SEC;
+
+ err = FsCreateFile(dir, (u8 *) dentry->d_name.name, FM_SYMLINK, &fid);
+ if (err) {
+ if (err == FFS_INVALIDPATH)
+ err = -EINVAL;
+ else if (err == FFS_FILEEXIST)
+ err = -EEXIST;
+ else if (err == FFS_FULL)
+ err = -ENOSPC;
+ else
+ err = -EIO;
+ goto out;
+ }
+
+ err = FsWriteFile(dir, &fid, (char *) target, len, &ret);
+
+ if (err) {
+ FsRemoveFile(dir, &fid);
+
+ if (err == FFS_FULL)
+ err = -ENOSPC;
+ else
+ err = -EIO;
+ goto out;
+ }
+
+ dir->i_version++;
+ dir->i_ctime = dir->i_mtime = dir->i_atime = ts;
+ if (IS_DIRSYNC(dir))
+ (void) exfat_sync_inode(dir);
+ else
+ mark_inode_dirty(dir);
+
+ i_pos = ((loff_t) fid.dir.dir << 32) | (fid.entry & 0xffffffff);
+
+ inode = exfat_build_inode(sb, &fid, i_pos);
+ if (IS_ERR(inode)) {
+ err = PTR_ERR(inode);
+ goto out;
+ }
+ inode->i_version++;
+ inode->i_mtime = inode->i_atime = inode->i_ctime = ts;
+ /* timestamp is already written, so mark_inode_dirty() is unneeded. */
+
+ EXFAT_I(inode)->target = kmalloc(len+1, GFP_KERNEL);
+ if (!EXFAT_I(inode)->target) {
+ err = -ENOMEM;
+ goto out;
+ }
+ memcpy(EXFAT_I(inode)->target, target, len+1);
+
+ dentry->d_time = dentry->d_parent->d_inode->i_version;
+ d_instantiate(dentry, inode);
+
+out:
+ __unlock_super(sb);
+ DPRINTK("exfat_symlink exited\n");
+ return err;
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0)
+static int exfat_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
+#else
+static int exfat_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+#endif
+{
+ struct super_block *sb = dir->i_sb;
+ struct inode *inode;
+ struct timespec ts;
+ FILE_ID_T fid;
+ loff_t i_pos;
+ int err;
+
+ __lock_super(sb);
+
+ DPRINTK("exfat_mkdir entered\n");
+
+ ts = CURRENT_TIME_SEC;
+
+ err = FsCreateDir(dir, (u8 *) dentry->d_name.name, &fid);
+ if (err) {
+ if (err == FFS_INVALIDPATH)
+ err = -EINVAL;
+ else if (err == FFS_FILEEXIST)
+ err = -EEXIST;
+ else if (err == FFS_FULL)
+ err = -ENOSPC;
+ else if (err == FFS_NAMETOOLONG)
+ err = -ENAMETOOLONG;
+ else
+ err = -EIO;
+ goto out;
+ }
+ dir->i_version++;
+ dir->i_ctime = dir->i_mtime = dir->i_atime = ts;
+ if (IS_DIRSYNC(dir))
+ (void) exfat_sync_inode(dir);
+ else
+ mark_inode_dirty(dir);
+ inc_nlink(dir);
+
+ i_pos = ((loff_t) fid.dir.dir << 32) | (fid.entry & 0xffffffff);
+
+ inode = exfat_build_inode(sb, &fid, i_pos);
+ if (IS_ERR(inode)) {
+ err = PTR_ERR(inode);
+ goto out;
+ }
+ inode->i_version++;
+ inode->i_mtime = inode->i_atime = inode->i_ctime = ts;
+ /* timestamp is already written, so mark_inode_dirty() is unneeded. */
+
+ dentry->d_time = dentry->d_parent->d_inode->i_version;
+ d_instantiate(dentry, inode);
+
+out:
+ __unlock_super(sb);
+ DPRINTK("exfat_mkdir exited\n");
+ return err;
+}
+
+static int exfat_rmdir(struct inode *dir, struct dentry *dentry)
+{
+ struct inode *inode = dentry->d_inode;
+ struct super_block *sb = dir->i_sb;
+ struct timespec ts;
+ int err;
+
+ __lock_super(sb);
+
+ DPRINTK("exfat_rmdir entered\n");
+
+ ts = CURRENT_TIME_SEC;
+
+ EXFAT_I(inode)->fid.size = i_size_read(inode);
+
+ err = FsRemoveDir(dir, &(EXFAT_I(inode)->fid));
+ if (err) {
+ if (err == FFS_INVALIDPATH)
+ err = -EINVAL;
+ else if (err == FFS_FILEEXIST)
+ err = -ENOTEMPTY;
+ else if (err == FFS_NOTFOUND)
+ err = -ENOENT;
+ else if (err == FFS_DIRBUSY)
+ err = -EBUSY;
+ else
+ err = -EIO;
+ goto out;
+ }
+ dir->i_version++;
+ dir->i_mtime = dir->i_atime = ts;
+ if (IS_DIRSYNC(dir))
+ (void) exfat_sync_inode(dir);
+ else
+ mark_inode_dirty(dir);
+ drop_nlink(dir);
+
+ clear_nlink(inode);
+ inode->i_mtime = inode->i_atime = ts;
+ exfat_detach(inode);
+ remove_inode_hash(inode);
+
+out:
+ __unlock_super(sb);
+ DPRINTK("exfat_rmdir exited\n");
+ return err;
+}
+
+static int exfat_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry)
+{
+ struct inode *old_inode, *new_inode;
+ struct super_block *sb = old_dir->i_sb;
+ struct timespec ts;
+ loff_t i_pos;
+ int err;
+
+ __lock_super(sb);
+
+ DPRINTK("exfat_rename entered\n");
+
+ old_inode = old_dentry->d_inode;
+ new_inode = new_dentry->d_inode;
+
+ ts = CURRENT_TIME_SEC;
+
+ EXFAT_I(old_inode)->fid.size = i_size_read(old_inode);
+
+ err = FsMoveFile(old_dir, &(EXFAT_I(old_inode)->fid), new_dir, new_dentry);
+ if (err) {
+ if (err == FFS_PERMISSIONERR)
+ err = -EPERM;
+ else if (err == FFS_INVALIDPATH)
+ err = -EINVAL;
+ else if (err == FFS_FILEEXIST)
+ err = -EEXIST;
+ else if (err == FFS_NOTFOUND)
+ err = -ENOENT;
+ else if (err == FFS_FULL)
+ err = -ENOSPC;
+ else
+ err = -EIO;
+ goto out;
+ }
+ new_dir->i_version++;
+ new_dir->i_ctime = new_dir->i_mtime = new_dir->i_atime = ts;
+ if (IS_DIRSYNC(new_dir))
+ (void) exfat_sync_inode(new_dir);
+ else
+ mark_inode_dirty(new_dir);
+
+ i_pos = ((loff_t) EXFAT_I(old_inode)->fid.dir.dir << 32) |
+ (EXFAT_I(old_inode)->fid.entry & 0xffffffff);
+
+ exfat_detach(old_inode);
+ exfat_attach(old_inode, i_pos);
+ if (IS_DIRSYNC(new_dir))
+ (void) exfat_sync_inode(old_inode);
+ else
+ mark_inode_dirty(old_inode);
+
+ if ((S_ISDIR(old_inode->i_mode)) && (old_dir != new_dir)) {
+ drop_nlink(old_dir);
+ if (!new_inode)
+ inc_nlink(new_dir);
+ }
+
+ old_dir->i_version++;
+ old_dir->i_ctime = old_dir->i_mtime = ts;
+ if (IS_DIRSYNC(old_dir))
+ (void) exfat_sync_inode(old_dir);
+ else
+ mark_inode_dirty(old_dir);
+
+ if (new_inode) {
+ exfat_detach(new_inode);
+ drop_nlink(new_inode);
+ if (S_ISDIR(new_inode->i_mode))
+ drop_nlink(new_inode);
+ new_inode->i_ctime = ts;
+ }
+
+out:
+ __unlock_super(sb);
+ DPRINTK("exfat_rename exited\n");
+ return err;
+}
+
+static int exfat_cont_expand(struct inode *inode, loff_t size)
+{
+ struct address_space *mapping = inode->i_mapping;
+ loff_t start = i_size_read(inode), count = size - i_size_read(inode);
+ int err, err2;
+
+ err = generic_cont_expand_simple(inode, size);
+ if (err != 0)
+ return err;
+
+ inode->i_ctime = inode->i_mtime = CURRENT_TIME_SEC;
+ mark_inode_dirty(inode);
+
+ if (IS_SYNC(inode)) {
+ err = filemap_fdatawrite_range(mapping, start, start + count - 1);
+ err2 = sync_mapping_buffers(mapping);
+ err = (err) ? (err) : (err2);
+ err2 = write_inode_now(inode, 1);
+ err = (err) ? (err) : (err2);
+ if (!err)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,32)
+ err = wait_on_page_writeback_range(mapping,
+ start >> PAGE_CACHE_SHIFT,
+ (start + count - 1) >> PAGE_CACHE_SHIFT);
+#else
+ err = filemap_fdatawait_range(mapping, start, start + count - 1);
+#endif
+ }
+ return err;
+}
+
+static int exfat_allow_set_time(struct exfat_sb_info *sbi, struct inode *inode)
+{
+ mode_t allow_utime = sbi->options.allow_utime;
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,5,0)
+ if (!uid_eq(current_fsuid(), inode->i_uid))
+#else
+ if (current_fsuid() != inode->i_uid)
+#endif
+ {
+ if (in_group_p(inode->i_gid))
+ allow_utime >>= 3;
+ if (allow_utime & MAY_WRITE)
+ return 1;
+ }
+
+ /* use a default check */
+ return 0;
+}
+
+static int exfat_sanitize_mode(const struct exfat_sb_info *sbi,
+ struct inode *inode, umode_t *mode_ptr)
+{
+ mode_t i_mode, mask, perm;
+
+ i_mode = inode->i_mode;
+
+ if (S_ISREG(i_mode) || S_ISLNK(i_mode))
+ mask = sbi->options.fs_fmask;
+ else
+ mask = sbi->options.fs_dmask;
+
+ perm = *mode_ptr & ~(S_IFMT | mask);
+
+ /* Of the r and x bits, all (subject to umask) must be present.*/
+ if ((perm & (S_IRUGO | S_IXUGO)) != (i_mode & (S_IRUGO|S_IXUGO)))
+ return -EPERM;
+
+ if (exfat_mode_can_hold_ro(inode)) {
+ /* Of the w bits, either all (subject to umask) or none must be present. */
+ if ((perm & S_IWUGO) && ((perm & S_IWUGO) != (S_IWUGO & ~mask)))
+ return -EPERM;
+ } else {
+ /* If exfat_mode_can_hold_ro(inode) is false, can't change w bits. */
+ if ((perm & S_IWUGO) != (S_IWUGO & ~mask))
+ return -EPERM;
+ }
+
+ *mode_ptr &= S_IFMT | perm;
+
+ return 0;
+}
+
+static int exfat_setattr(struct dentry *dentry, struct iattr *attr)
+{
+
+ struct exfat_sb_info *sbi = EXFAT_SB(dentry->d_sb);
+ struct inode *inode = dentry->d_inode;
+ unsigned int ia_valid;
+ int error;
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,35)
+ loff_t old_size;
+#endif
+
+ DPRINTK("exfat_setattr entered\n");
+
+ if ((attr->ia_valid & ATTR_SIZE)
+ && (attr->ia_size > i_size_read(inode))) {
+ error = exfat_cont_expand(inode, attr->ia_size);
+ if (error || attr->ia_valid == ATTR_SIZE)
+ return error;
+ attr->ia_valid &= ~ATTR_SIZE;
+ }
+
+ ia_valid = attr->ia_valid;
+
+ if ((ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET))
+ && exfat_allow_set_time(sbi, inode)) {
+ attr->ia_valid &= ~(ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET);
+ }
+
+ error = inode_change_ok(inode, attr);
+ attr->ia_valid = ia_valid;
+ if (error)
+ return error;
+
+ if (((attr->ia_valid & ATTR_UID) &&
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,5,0)
+ (!uid_eq(attr->ia_uid, sbi->options.fs_uid))) ||
+ ((attr->ia_valid & ATTR_GID) &&
+ (!gid_eq(attr->ia_gid, sbi->options.fs_gid))) ||
+#else
+ (attr->ia_uid != sbi->options.fs_uid)) ||
+ ((attr->ia_valid & ATTR_GID) &&
+ (attr->ia_gid != sbi->options.fs_gid)) ||
+#endif
+ ((attr->ia_valid & ATTR_MODE) &&
+ (attr->ia_mode & ~(S_IFREG | S_IFLNK | S_IFDIR | S_IRWXUGO)))) {
+ return -EPERM;
+ }
+
+ /*
+ * We don't return -EPERM here. Yes, strange, but this is too
+ * old behavior.
+ */
+ if (attr->ia_valid & ATTR_MODE) {
+ if (exfat_sanitize_mode(sbi, inode, &attr->ia_mode) < 0)
+ attr->ia_valid &= ~ATTR_MODE;
+ }
+
+ EXFAT_I(inode)->fid.size = i_size_read(inode);
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36)
+ if (attr->ia_valid)
+ error = inode_setattr(inode, attr);
+#else
+ if (attr->ia_valid & ATTR_SIZE) {
+ old_size = i_size_read(inode);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,00)
+ down_write(&EXFAT_I(inode)->truncate_lock);
+ truncate_setsize(inode, attr->ia_size);
+ _exfat_truncate(inode, old_size);
+ up_write(&EXFAT_I(inode)->truncate_lock);
+#else
+ truncate_setsize(inode, attr->ia_size);
+ _exfat_truncate(inode, old_size);
+#endif
+ }
+ setattr_copy(inode, attr);
+ mark_inode_dirty(inode);
+#endif
+
+ DPRINTK("exfat_setattr exited\n");
+ return error;
+}
+
+static int exfat_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
+{
+ struct inode *inode = dentry->d_inode;
+
+ DPRINTK("exfat_getattr entered\n");
+
+ generic_fillattr(inode, stat);
+ stat->blksize = EXFAT_SB(inode->i_sb)->fs_info.cluster_size;
+
+ DPRINTK("exfat_getattr exited\n");
+ return 0;
+}
+
+const struct inode_operations exfat_dir_inode_operations = {
+ .create = exfat_create,
+ .lookup = exfat_lookup,
+ .unlink = exfat_unlink,
+ .symlink = exfat_symlink,
+ .mkdir = exfat_mkdir,
+ .rmdir = exfat_rmdir,
+ .rename = exfat_rename,
+ .setattr = exfat_setattr,
+ .getattr = exfat_getattr,
+};
+
+/*======================================================================*/
+/* File Operations */
+/*======================================================================*/
+#if LINUX_VERSION_CODE > KERNEL_VERSION(4,1,0)
+static const char *exfat_follow_link(struct dentry *dentry, void **cookie)
+{
+ struct exfat_inode_info *ei = EXFAT_I(dentry->d_inode);
+ return *cookie = (char *)(ei->target);
+}
+#else
+static void *exfat_follow_link(struct dentry *dentry, struct nameidata *nd)
+{
+ struct exfat_inode_info *ei = EXFAT_I(dentry->d_inode);
+ nd_set_link(nd, (char *)(ei->target));
+ return NULL;
+}
+#endif
+
+const struct inode_operations exfat_symlink_inode_operations = {
+ .readlink = generic_readlink,
+ .follow_link = exfat_follow_link,
+};
+
+static int exfat_file_release(struct inode *inode, struct file *filp)
+{
+ struct super_block *sb = inode->i_sb;
+
+ EXFAT_I(inode)->fid.size = i_size_read(inode);
+ FsSyncVol(sb, 0);
+ return 0;
+}
+
+const struct file_operations exfat_file_operations = {
+ .llseek = generic_file_llseek,
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,16,0)
+ .read = do_sync_read,
+ .write = do_sync_write,
+ .aio_read = generic_file_aio_read,
+ .aio_write = generic_file_aio_write,
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(4,1,0)
+ .read = new_sync_read,
+ .write = new_sync_write,
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,16,0)
+ .read_iter = generic_file_read_iter,
+ .write_iter = generic_file_write_iter,
+#endif
+ .mmap = generic_file_mmap,
+ .release = exfat_file_release,
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36)
+ .ioctl = exfat_generic_ioctl,
+ .fsync = exfat_file_fsync,
+#else
+ .unlocked_ioctl = exfat_generic_ioctl,
+ .fsync = generic_file_fsync,
+#endif
+ .splice_read = generic_file_splice_read,
+};
+
+static void _exfat_truncate(struct inode *inode, loff_t old_size)
+{
+ struct super_block *sb = inode->i_sb;
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ FS_INFO_T *p_fs = &(sbi->fs_info);
+ int err;
+
+ __lock_super(sb);
+
+ /*
+ * This protects against truncating a file bigger than it was then
+ * trying to write into the hole.
+ */
+ if (EXFAT_I(inode)->mmu_private > i_size_read(inode))
+ EXFAT_I(inode)->mmu_private = i_size_read(inode);
+
+ if (EXFAT_I(inode)->fid.start_clu == 0)
+ goto out;
+
+ err = FsTruncateFile(inode, old_size, i_size_read(inode));
+ if (err)
+ goto out;
+
+ inode->i_ctime = inode->i_mtime = CURRENT_TIME_SEC;
+ if (IS_DIRSYNC(inode))
+ (void) exfat_sync_inode(inode);
+ else
+ mark_inode_dirty(inode);
+
+ inode->i_blocks = ((i_size_read(inode) + (p_fs->cluster_size - 1))
+ & ~((loff_t)p_fs->cluster_size - 1)) >> 9;
+out:
+ __unlock_super(sb);
+}
+
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,36)
+static void exfat_truncate(struct inode *inode)
+{
+ _exfat_truncate(inode, i_size_read(inode));
+}
+#endif
+
+const struct inode_operations exfat_file_inode_operations = {
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,36)
+ .truncate = exfat_truncate,
+#endif
+ .setattr = exfat_setattr,
+ .getattr = exfat_getattr,
+};
+
+/*======================================================================*/
+/* Address Space Operations */
+/*======================================================================*/
+
+static int exfat_bmap(struct inode *inode, sector_t sector, sector_t *phys,
+ unsigned long *mapped_blocks, int *create)
+{
+ struct super_block *sb = inode->i_sb;
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ FS_INFO_T *p_fs = &(sbi->fs_info);
+ BD_INFO_T *p_bd = &(sbi->bd_info);
+ const unsigned long blocksize = sb->s_blocksize;
+ const unsigned char blocksize_bits = sb->s_blocksize_bits;
+ sector_t last_block;
+ int err, clu_offset, sec_offset;
+ unsigned int cluster;
+
+ *phys = 0;
+ *mapped_blocks = 0;
+
+ if ((p_fs->vol_type == FAT12) || (p_fs->vol_type == FAT16)) {
+ if (inode->i_ino == EXFAT_ROOT_INO) {
+ if (sector < (p_fs->dentries_in_root >> (p_bd->sector_size_bits-DENTRY_SIZE_BITS))) {
+ *phys = sector + p_fs->root_start_sector;
+ *mapped_blocks = 1;
+ }
+ return 0;
+ }
+ }
+
+ last_block = (i_size_read(inode) + (blocksize - 1)) >> blocksize_bits;
+ if (sector >= last_block) {
+ if (*create == 0)
+ return 0;
+ } else {
+ *create = 0;
+ }
+
+ clu_offset = sector >> p_fs->sectors_per_clu_bits; /* cluster offset */
+ sec_offset = sector & (p_fs->sectors_per_clu - 1); /* sector offset in cluster */
+
+ EXFAT_I(inode)->fid.size = i_size_read(inode);
+
+ err = FsMapCluster(inode, clu_offset, &cluster);
+
+ if (err) {
+ if (err == FFS_FULL)
+ return -ENOSPC;
+ else
+ return -EIO;
+ } else if (cluster != CLUSTER_32(~0)) {
+ *phys = START_SECTOR(cluster) + sec_offset;
+ *mapped_blocks = p_fs->sectors_per_clu - sec_offset;
+ }
+
+ return 0;
+}
+
+static int exfat_get_block(struct inode *inode, sector_t iblock,
+ struct buffer_head *bh_result, int create)
+{
+ struct super_block *sb = inode->i_sb;
+ unsigned long max_blocks = bh_result->b_size >> inode->i_blkbits;
+ int err;
+ unsigned long mapped_blocks;
+ sector_t phys;
+
+ __lock_super(sb);
+
+ err = exfat_bmap(inode, iblock, &phys, &mapped_blocks, &create);
+ if (err) {
+ __unlock_super(sb);
+ return err;
+ }
+
+ if (phys) {
+ max_blocks = min(mapped_blocks, max_blocks);
+ if (create) {
+ EXFAT_I(inode)->mmu_private += max_blocks << sb->s_blocksize_bits;
+ set_buffer_new(bh_result);
+ }
+ map_bh(bh_result, sb, phys);
+ }
+
+ bh_result->b_size = max_blocks << sb->s_blocksize_bits;
+ __unlock_super(sb);
+
+ return 0;
+}
+
+static int exfat_readpage(struct file *file, struct page *page)
+{
+ int ret;
+ ret = mpage_readpage(page, exfat_get_block);
+ return ret;
+}
+
+static int exfat_readpages(struct file *file, struct address_space *mapping,
+ struct list_head *pages, unsigned nr_pages)
+{
+ int ret;
+ ret = mpage_readpages(mapping, pages, nr_pages, exfat_get_block);
+ return ret;
+}
+
+static int exfat_writepage(struct page *page, struct writeback_control *wbc)
+{
+ int ret;
+ ret = block_write_full_page(page, exfat_get_block, wbc);
+ return ret;
+}
+
+static int exfat_writepages(struct address_space *mapping,
+ struct writeback_control *wbc)
+{
+ int ret;
+ ret = mpage_writepages(mapping, wbc, exfat_get_block);
+ return ret;
+}
+
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,34)
+static void exfat_write_failed(struct address_space *mapping, loff_t to)
+{
+ struct inode *inode = mapping->host;
+ if (to > i_size_read(inode)) {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0)
+ truncate_pagecache(inode, i_size_read(inode));
+#else
+ truncate_pagecache(inode, to, i_size_read(inode));
+#endif
+ EXFAT_I(inode)->fid.size = i_size_read(inode);
+ _exfat_truncate(inode, i_size_read(inode));
+ }
+}
+#endif
+
+static int exfat_write_begin(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned flags,
+ struct page **pagep, void **fsdata)
+{
+ int ret;
+ *pagep = NULL;
+ ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
+ exfat_get_block,
+ &EXFAT_I(mapping->host)->mmu_private);
+
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,34)
+ if (ret < 0)
+ exfat_write_failed(mapping, pos+len);
+#endif
+ return ret;
+}
+
+static int exfat_write_end(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied,
+ struct page *pagep, void *fsdata)
+{
+ struct inode *inode = mapping->host;
+ FILE_ID_T *fid = &(EXFAT_I(inode)->fid);
+ int err;
+
+ err = generic_write_end(file, mapping, pos, len, copied, pagep, fsdata);
+
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,34)
+ if (err < len)
+ exfat_write_failed(mapping, pos+len);
+#endif
+
+ if (!(err < 0) && !(fid->attr & ATTR_ARCHIVE)) {
+ inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
+ fid->attr |= ATTR_ARCHIVE;
+ mark_inode_dirty(inode);
+ }
+ return err;
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,16,0)
+#ifdef CONFIG_AIO_OPTIMIZATION
+static ssize_t exfat_direct_IO(int rw, struct kiocb *iocb,
+ struct iov_iter *iter, loff_t offset)
+#else
+static ssize_t exfat_direct_IO(int rw, struct kiocb *iocb,
+ const struct iovec *iov,
+ loff_t offset, unsigned long nr_segs)
+#endif
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(4,2,0)
+static ssize_t exfat_direct_IO(int rw, struct kiocb *iocb,
+ struct iov_iter *iter, loff_t offset)
+#else /* >= 4.1.x */
+static ssize_t exfat_direct_IO(struct kiocb *iocb,
+ struct iov_iter *iter, loff_t offset)
+#endif
+{
+ struct inode *inode = iocb->ki_filp->f_mapping->host;
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,34)
+ struct address_space *mapping = iocb->ki_filp->f_mapping;
+#endif
+ ssize_t ret;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,2,0)
+ int rw;
+
+ rw = iov_iter_rw(iter);
+#endif
+
+ if (rw == WRITE) {
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,16,0)
+#ifdef CONFIG_AIO_OPTIMIZATION
+ if (EXFAT_I(inode)->mmu_private <
+ (offset + iov_iter_count(iter)))
+#else
+ if (EXFAT_I(inode)->mmu_private < (offset + iov_length(iov, nr_segs)))
+#endif
+#else
+ if (EXFAT_I(inode)->mmu_private < (offset + iov_iter_count(iter)))
+#endif
+ return 0;
+ }
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,1,0)
+ ret = blockdev_direct_IO(iocb, inode, iter,
+ offset, exfat_get_block);
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(3,16,0)
+ ret = blockdev_direct_IO(rw, iocb, inode, iter,
+ offset, exfat_get_block);
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0)
+#ifdef CONFIG_AIO_OPTIMIZATION
+ ret = blockdev_direct_IO(rw, iocb, inode, iter,
+ offset, exfat_get_block);
+#else
+ ret = blockdev_direct_IO(rw, iocb, inode, iov,
+ offset, nr_segs, exfat_get_block);
+#endif
+#else
+ ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
+ offset, nr_segs, exfat_get_block, NULL);
+#endif
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,16,0)
+ if ((ret < 0) && (rw & WRITE))
+ exfat_write_failed(mapping, offset+iov_iter_count(iter));
+#elif LINUX_VERSION_CODE > KERNEL_VERSION(2,6,34)
+ if ((ret < 0) && (rw & WRITE))
+#ifdef CONFIG_AIO_OPTIMIZATION
+ exfat_write_failed(mapping, offset+iov_iter_count(iter));
+#else
+ exfat_write_failed(mapping, offset+iov_length(iov, nr_segs));
+#endif
+#endif
+ return ret;
+}
+
+static sector_t _exfat_bmap(struct address_space *mapping, sector_t block)
+{
+ sector_t blocknr;
+
+ /* exfat_get_cluster() assumes the requested blocknr isn't truncated. */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,00)
+ down_read(&EXFAT_I(mapping->host)->truncate_lock);
+ blocknr = generic_block_bmap(mapping, block, exfat_get_block);
+ up_read(&EXFAT_I(mapping->host)->truncate_lock);
+#else
+ down_read(&EXFAT_I(mapping->host)->i_alloc_sem);
+ blocknr = generic_block_bmap(mapping, block, exfat_get_block);
+ up_read(&EXFAT_I(mapping->host)->i_alloc_sem);
+#endif
+
+ return blocknr;
+}
+
+const struct address_space_operations exfat_aops = {
+ .readpage = exfat_readpage,
+ .readpages = exfat_readpages,
+ .writepage = exfat_writepage,
+ .writepages = exfat_writepages,
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39)
+ .sync_page = block_sync_page,
+#endif
+ .write_begin = exfat_write_begin,
+ .write_end = exfat_write_end,
+ .direct_IO = exfat_direct_IO,
+ .bmap = _exfat_bmap
+};
+
+/*======================================================================*/
+/* Super Operations */
+/*======================================================================*/
+
+static inline unsigned long exfat_hash(loff_t i_pos)
+{
+ return hash_32(i_pos, EXFAT_HASH_BITS);
+}
+
+static struct inode *exfat_iget(struct super_block *sb, loff_t i_pos)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ struct exfat_inode_info *info;
+ struct hlist_head *head = sbi->inode_hashtable + exfat_hash(i_pos);
+ struct inode *inode = NULL;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,9,0)
+ struct hlist_node *node;
+
+ spin_lock(&sbi->inode_hash_lock);
+ hlist_for_each_entry(info, node, head, i_hash_fat) {
+#else
+ spin_lock(&sbi->inode_hash_lock);
+ hlist_for_each_entry(info, head, i_hash_fat) {
+#endif
+ CHECK_ERR(info->vfs_inode.i_sb != sb);
+
+ if (i_pos != info->i_pos)
+ continue;
+ inode = igrab(&info->vfs_inode);
+ if (inode)
+ break;
+ }
+ spin_unlock(&sbi->inode_hash_lock);
+ return inode;
+}
+
+static void exfat_attach(struct inode *inode, loff_t i_pos)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb);
+ struct hlist_head *head = sbi->inode_hashtable + exfat_hash(i_pos);
+
+ spin_lock(&sbi->inode_hash_lock);
+ EXFAT_I(inode)->i_pos = i_pos;
+ hlist_add_head(&EXFAT_I(inode)->i_hash_fat, head);
+ spin_unlock(&sbi->inode_hash_lock);
+}
+
+static void exfat_detach(struct inode *inode)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb);
+
+ spin_lock(&sbi->inode_hash_lock);
+ hlist_del_init(&EXFAT_I(inode)->i_hash_fat);
+ EXFAT_I(inode)->i_pos = 0;
+ spin_unlock(&sbi->inode_hash_lock);
+}
+
+/* doesn't deal with root inode */
+static int exfat_fill_inode(struct inode *inode, FILE_ID_T *fid)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb);
+ FS_INFO_T *p_fs = &(sbi->fs_info);
+ DIR_ENTRY_T info;
+
+ memcpy(&(EXFAT_I(inode)->fid), fid, sizeof(FILE_ID_T));
+
+ FsReadStat(inode, &info);
+
+ EXFAT_I(inode)->i_pos = 0;
+ EXFAT_I(inode)->target = NULL;
+ inode->i_uid = sbi->options.fs_uid;
+ inode->i_gid = sbi->options.fs_gid;
+ inode->i_version++;
+ inode->i_generation = get_seconds();
+
+ if (info.Attr & ATTR_SUBDIR) { /* directory */
+ inode->i_generation &= ~1;
+ inode->i_mode = exfat_make_mode(sbi, info.Attr, S_IRWXUGO);
+ inode->i_op = &exfat_dir_inode_operations;
+ inode->i_fop = &exfat_dir_operations;
+
+ i_size_write(inode, info.Size);
+ EXFAT_I(inode)->mmu_private = i_size_read(inode);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,2,00)
+ set_nlink(inode, info.NumSubdirs);
+#else
+ inode->i_nlink = info.NumSubdirs;
+#endif
+ } else if (info.Attr & ATTR_SYMLINK) { /* symbolic link */
+ inode->i_generation |= 1;
+ inode->i_mode = exfat_make_mode(sbi, info.Attr, S_IRWXUGO);
+ inode->i_op = &exfat_symlink_inode_operations;
+
+ i_size_write(inode, info.Size);
+ EXFAT_I(inode)->mmu_private = i_size_read(inode);
+ } else { /* regular file */
+ inode->i_generation |= 1;
+ inode->i_mode = exfat_make_mode(sbi, info.Attr, S_IRWXUGO);
+ inode->i_op = &exfat_file_inode_operations;
+ inode->i_fop = &exfat_file_operations;
+ inode->i_mapping->a_ops = &exfat_aops;
+ inode->i_mapping->nrpages = 0;
+
+ i_size_write(inode, info.Size);
+ EXFAT_I(inode)->mmu_private = i_size_read(inode);
+ }
+ exfat_save_attr(inode, info.Attr);
+
+ inode->i_blocks = ((i_size_read(inode) + (p_fs->cluster_size - 1))
+ & ~((loff_t)p_fs->cluster_size - 1)) >> 9;
+
+ exfat_time_fat2unix(sbi, &inode->i_mtime, &info.ModifyTimestamp);
+ exfat_time_fat2unix(sbi, &inode->i_ctime, &info.CreateTimestamp);
+ exfat_time_fat2unix(sbi, &inode->i_atime, &info.AccessTimestamp);
+
+ return 0;
+}
+
+static struct inode *exfat_build_inode(struct super_block *sb,
+ FILE_ID_T *fid, loff_t i_pos) {
+ struct inode *inode;
+ int err;
+
+ inode = exfat_iget(sb, i_pos);
+ if (inode)
+ goto out;
+ inode = new_inode(sb);
+ if (!inode) {
+ inode = ERR_PTR(-ENOMEM);
+ goto out;
+ }
+ inode->i_ino = iunique(sb, EXFAT_ROOT_INO);
+ inode->i_version = 1;
+ err = exfat_fill_inode(inode, fid);
+ if (err) {
+ iput(inode);
+ inode = ERR_PTR(err);
+ goto out;
+ }
+ exfat_attach(inode, i_pos);
+ insert_inode_hash(inode);
+out:
+ return inode;
+}
+
+static int exfat_sync_inode(struct inode *inode)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,34)
+ return exfat_write_inode(inode, 0);
+#else
+ return exfat_write_inode(inode, NULL);
+#endif
+}
+
+static struct inode *exfat_alloc_inode(struct super_block *sb)
+{
+ struct exfat_inode_info *ei;
+
+ ei = kmem_cache_alloc(exfat_inode_cachep, GFP_NOFS);
+ if (!ei)
+ return NULL;
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,00)
+ init_rwsem(&ei->truncate_lock);
+#endif
+
+ return &ei->vfs_inode;
+}
+
+static void exfat_destroy_inode(struct inode *inode)
+{
+ if (EXFAT_I(inode)->target)
+ kfree(EXFAT_I(inode)->target);
+ EXFAT_I(inode)->target = NULL;
+
+ kmem_cache_free(exfat_inode_cachep, EXFAT_I(inode));
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,34)
+static int exfat_write_inode(struct inode *inode, int wait)
+#else
+static int exfat_write_inode(struct inode *inode, struct writeback_control *wbc)
+#endif
+{
+ struct super_block *sb = inode->i_sb;
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ DIR_ENTRY_T info;
+
+ if (inode->i_ino == EXFAT_ROOT_INO)
+ return 0;
+
+ info.Attr = exfat_make_attr(inode);
+ info.Size = i_size_read(inode);
+
+ exfat_time_unix2fat(sbi, &inode->i_mtime, &info.ModifyTimestamp);
+ exfat_time_unix2fat(sbi, &inode->i_ctime, &info.CreateTimestamp);
+ exfat_time_unix2fat(sbi, &inode->i_atime, &info.AccessTimestamp);
+
+ FsWriteStat(inode, &info);
+
+ return 0;
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36)
+static void exfat_delete_inode(struct inode *inode)
+{
+ truncate_inode_pages(&inode->i_data, 0);
+ clear_inode(inode);
+}
+
+static void exfat_clear_inode(struct inode *inode)
+{
+ exfat_detach(inode);
+ remove_inode_hash(inode);
+}
+#else
+static void exfat_evict_inode(struct inode *inode)
+{
+ truncate_inode_pages(&inode->i_data, 0);
+
+ if (!inode->i_nlink)
+ i_size_write(inode, 0);
+ invalidate_inode_buffers(inode);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,4,80)
+ end_writeback(inode);
+#else
+ clear_inode(inode);
+#endif
+ exfat_detach(inode);
+
+ remove_inode_hash(inode);
+}
+#endif
+
+static void exfat_free_super(struct exfat_sb_info *sbi)
+{
+ if (sbi->nls_disk)
+ unload_nls(sbi->nls_disk);
+ if (sbi->nls_io)
+ unload_nls(sbi->nls_io);
+ if (sbi->options.iocharset != exfat_default_iocharset)
+ kfree(sbi->options.iocharset);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,0)
+ /* mutex_init is in exfat_fill_super function. only for 3.7+ */
+ mutex_destroy(&sbi->s_lock);
+#endif
+ kfree(sbi);
+}
+
+static void exfat_put_super(struct super_block *sb)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ if (__is_sb_dirty(sb))
+ exfat_write_super(sb);
+
+ FsUmountVol(sb);
+
+ sb->s_fs_info = NULL;
+ exfat_free_super(sbi);
+}
+
+static void exfat_write_super(struct super_block *sb)
+{
+ __lock_super(sb);
+
+ __set_sb_clean(sb);
+
+ if (!(sb->s_flags & MS_RDONLY))
+ FsSyncVol(sb, 1);
+
+ __unlock_super(sb);
+}
+
+static int exfat_sync_fs(struct super_block *sb, int wait)
+{
+ int err = 0;
+
+ if (__is_sb_dirty(sb)) {
+ __lock_super(sb);
+ __set_sb_clean(sb);
+ err = FsSyncVol(sb, 1);
+ __unlock_super(sb);
+ }
+
+ return err;
+}
+
+static int exfat_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+ struct super_block *sb = dentry->d_sb;
+ u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
+ FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
+ VOL_INFO_T info;
+
+ if (p_fs->used_clusters == (u32) ~0) {
+ if (FFS_MEDIAERR == FsGetVolInfo(sb, &info))
+ return -EIO;
+
+ } else {
+ info.FatType = p_fs->vol_type;
+ info.ClusterSize = p_fs->cluster_size;
+ info.NumClusters = p_fs->num_clusters - 2;
+ info.UsedClusters = p_fs->used_clusters;
+ info.FreeClusters = info.NumClusters - info.UsedClusters;
+
+ if (p_fs->dev_ejected)
+ printk("[EXFAT] statfs on device is ejected\n");
+ }
+
+ buf->f_type = sb->s_magic;
+ buf->f_bsize = info.ClusterSize;
+ buf->f_blocks = info.NumClusters;
+ buf->f_bfree = info.FreeClusters;
+ buf->f_bavail = info.FreeClusters;
+ buf->f_fsid.val[0] = (u32)id;
+ buf->f_fsid.val[1] = (u32)(id >> 32);
+ buf->f_namelen = 260;
+
+ return 0;
+}
+
+static int exfat_remount(struct super_block *sb, int *flags, char *data)
+{
+ *flags |= MS_NODIRATIME;
+ return 0;
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0)
+static int exfat_show_options(struct seq_file *m, struct dentry *root)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(root->d_sb);
+#else
+static int exfat_show_options(struct seq_file *m, struct vfsmount *mnt)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(mnt->mnt_sb);
+#endif
+ struct exfat_mount_options *opts = &sbi->options;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,5,0)
+ if (__kuid_val(opts->fs_uid))
+ seq_printf(m, ",uid=%u", __kuid_val(opts->fs_uid));
+ if (__kgid_val(opts->fs_gid))
+ seq_printf(m, ",gid=%u", __kgid_val(opts->fs_gid));
+#else
+ if (opts->fs_uid != 0)
+ seq_printf(m, ",uid=%u", opts->fs_uid);
+ if (opts->fs_gid != 0)
+ seq_printf(m, ",gid=%u", opts->fs_gid);
+#endif
+ seq_printf(m, ",fmask=%04o", opts->fs_fmask);
+ seq_printf(m, ",dmask=%04o", opts->fs_dmask);
+ if (opts->allow_utime)
+ seq_printf(m, ",allow_utime=%04o", opts->allow_utime);
+ if (sbi->nls_disk)
+ seq_printf(m, ",codepage=%s", sbi->nls_disk->charset);
+ if (sbi->nls_io)
+ seq_printf(m, ",iocharset=%s", sbi->nls_io->charset);
+ seq_printf(m, ",namecase=%u", opts->casesensitive);
+ if (opts->errors == EXFAT_ERRORS_CONT)
+ seq_puts(m, ",errors=continue");
+ else if (opts->errors == EXFAT_ERRORS_PANIC)
+ seq_puts(m, ",errors=panic");
+ else
+ seq_puts(m, ",errors=remount-ro");
+#ifdef CONFIG_EXFAT_DISCARD
+ if (opts->discard)
+ seq_printf(m, ",discard");
+#endif
+ return 0;
+}
+
+const struct super_operations exfat_sops = {
+ .alloc_inode = exfat_alloc_inode,
+ .destroy_inode = exfat_destroy_inode,
+ .write_inode = exfat_write_inode,
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36)
+ .delete_inode = exfat_delete_inode,
+ .clear_inode = exfat_clear_inode,
+#else
+ .evict_inode = exfat_evict_inode,
+#endif
+ .put_super = exfat_put_super,
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,7,0)
+ .write_super = exfat_write_super,
+#endif
+ .sync_fs = exfat_sync_fs,
+ .statfs = exfat_statfs,
+ .remount_fs = exfat_remount,
+ .show_options = exfat_show_options,
+};
+
+/*======================================================================*/
+/* Super Block Read Operations */
+/*======================================================================*/
+
+enum {
+ Opt_uid,
+ Opt_gid,
+ Opt_umask,
+ Opt_dmask,
+ Opt_fmask,
+ Opt_allow_utime,
+ Opt_codepage,
+ Opt_charset,
+ Opt_namecase,
+ Opt_debug,
+ Opt_err_cont,
+ Opt_err_panic,
+ Opt_err_ro,
+ Opt_utf8_hack,
+ Opt_err,
+#ifdef CONFIG_EXFAT_DISCARD
+ Opt_discard,
+#endif /* EXFAT_CONFIG_DISCARD */
+};
+
+static const match_table_t exfat_tokens = {
+ {Opt_uid, "uid=%u"},
+ {Opt_gid, "gid=%u"},
+ {Opt_umask, "umask=%o"},
+ {Opt_dmask, "dmask=%o"},
+ {Opt_fmask, "fmask=%o"},
+ {Opt_allow_utime, "allow_utime=%o"},
+ {Opt_codepage, "codepage=%u"},
+ {Opt_charset, "iocharset=%s"},
+ {Opt_namecase, "namecase=%u"},
+ {Opt_debug, "debug"},
+ {Opt_err_cont, "errors=continue"},
+ {Opt_err_panic, "errors=panic"},
+ {Opt_err_ro, "errors=remount-ro"},
+ {Opt_utf8_hack, "utf8"},
+#ifdef CONFIG_EXFAT_DISCARD
+ {Opt_discard, "discard"},
+#endif /* CONFIG_EXFAT_DISCARD */
+ {Opt_err, NULL}
+};
+
+static int parse_options(char *options, int silent, int *debug,
+ struct exfat_mount_options *opts)
+{
+ char *p;
+ substring_t args[MAX_OPT_ARGS];
+ int option;
+ char *iocharset;
+
+ opts->fs_uid = current_uid();
+ opts->fs_gid = current_gid();
+ opts->fs_fmask = opts->fs_dmask = current->fs->umask;
+ opts->allow_utime = (unsigned short) -1;
+ opts->codepage = exfat_default_codepage;
+ opts->iocharset = exfat_default_iocharset;
+ opts->casesensitive = 0;
+ opts->errors = EXFAT_ERRORS_RO;
+#ifdef CONFIG_EXFAT_DISCARD
+ opts->discard = 0;
+#endif
+ *debug = 0;
+
+ if (!options)
+ goto out;
+
+ while ((p = strsep(&options, ",")) != NULL) {
+ int token;
+ if (!*p)
+ continue;
+
+ token = match_token(p, exfat_tokens, args);
+ switch (token) {
+ case Opt_uid:
+ if (match_int(&args[0], &option))
+ return 0;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,5,0)
+ opts->fs_uid = KUIDT_INIT(option);
+#else
+ opts->fs_uid = option;
+#endif
+ break;
+ case Opt_gid:
+ if (match_int(&args[0], &option))
+ return 0;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,5,0)
+ opts->fs_gid = KGIDT_INIT(option);
+#else
+ opts->fs_gid = option;
+#endif
+ break;
+ case Opt_umask:
+ case Opt_dmask:
+ case Opt_fmask:
+ if (match_octal(&args[0], &option))
+ return 0;
+ if (token != Opt_dmask)
+ opts->fs_fmask = option;
+ if (token != Opt_fmask)
+ opts->fs_dmask = option;
+ break;
+ case Opt_allow_utime:
+ if (match_octal(&args[0], &option))
+ return 0;
+ opts->allow_utime = option & (S_IWGRP | S_IWOTH);
+ break;
+ case Opt_codepage:
+ if (match_int(&args[0], &option))
+ return 0;
+ opts->codepage = option;
+ break;
+ case Opt_charset:
+ if (opts->iocharset != exfat_default_iocharset)
+ kfree(opts->iocharset);
+ iocharset = match_strdup(&args[0]);
+ if (!iocharset)
+ return -ENOMEM;
+ opts->iocharset = iocharset;
+ break;
+ case Opt_namecase:
+ if (match_int(&args[0], &option))
+ return 0;
+ opts->casesensitive = option;
+ break;
+ case Opt_err_cont:
+ opts->errors = EXFAT_ERRORS_CONT;
+ break;
+ case Opt_err_panic:
+ opts->errors = EXFAT_ERRORS_PANIC;
+ break;
+ case Opt_err_ro:
+ opts->errors = EXFAT_ERRORS_RO;
+ break;
+ case Opt_debug:
+ *debug = 1;
+ break;
+#ifdef CONFIG_EXFAT_DISCARD
+ case Opt_discard:
+ opts->discard = 1;
+ break;
+#endif /* CONFIG_EXFAT_DISCARD */
+ case Opt_utf8_hack:
+ break;
+ default:
+ if (!silent)
+ printk(KERN_ERR "[EXFAT] Unrecognized mount option %s or missing value\n", p);
+ return -EINVAL;
+ }
+ }
+
+out:
+ if (opts->allow_utime == (unsigned short) -1)
+ opts->allow_utime = ~opts->fs_dmask & (S_IWGRP | S_IWOTH);
+
+ return 0;
+}
+
+static void exfat_hash_init(struct super_block *sb)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ int i;
+
+ spin_lock_init(&sbi->inode_hash_lock);
+ for (i = 0; i < EXFAT_HASH_SIZE; i++)
+ INIT_HLIST_HEAD(&sbi->inode_hashtable[i]);
+}
+
+static int exfat_read_root(struct inode *inode)
+{
+ struct super_block *sb = inode->i_sb;
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ struct timespec ts;
+ FS_INFO_T *p_fs = &(sbi->fs_info);
+ DIR_ENTRY_T info;
+
+ ts = CURRENT_TIME_SEC;
+
+ EXFAT_I(inode)->fid.dir.dir = p_fs->root_dir;
+ EXFAT_I(inode)->fid.dir.flags = 0x01;
+ EXFAT_I(inode)->fid.entry = -1;
+ EXFAT_I(inode)->fid.start_clu = p_fs->root_dir;
+ EXFAT_I(inode)->fid.flags = 0x01;
+ EXFAT_I(inode)->fid.type = TYPE_DIR;
+ EXFAT_I(inode)->fid.rwoffset = 0;
+ EXFAT_I(inode)->fid.hint_last_off = -1;
+
+ EXFAT_I(inode)->target = NULL;
+
+ FsReadStat(inode, &info);
+
+ inode->i_uid = sbi->options.fs_uid;
+ inode->i_gid = sbi->options.fs_gid;
+ inode->i_version++;
+ inode->i_generation = 0;
+ inode->i_mode = exfat_make_mode(sbi, ATTR_SUBDIR, S_IRWXUGO);
+ inode->i_op = &exfat_dir_inode_operations;
+ inode->i_fop = &exfat_dir_operations;
+
+ i_size_write(inode, info.Size);
+ inode->i_blocks = ((i_size_read(inode) + (p_fs->cluster_size - 1))
+ & ~((loff_t)p_fs->cluster_size - 1)) >> 9;
+ EXFAT_I(inode)->i_pos = ((loff_t) p_fs->root_dir << 32) | 0xffffffff;
+ EXFAT_I(inode)->mmu_private = i_size_read(inode);
+
+ exfat_save_attr(inode, ATTR_SUBDIR);
+ inode->i_mtime = inode->i_atime = inode->i_ctime = ts;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,2,00)
+ set_nlink(inode, info.NumSubdirs + 2);
+#else
+ inode->i_nlink = info.NumSubdirs + 2;
+#endif
+
+ return 0;
+}
+
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,37)
+static void setup_dops(struct super_block *sb)
+{
+ if (EXFAT_SB(sb)->options.casesensitive == 0)
+ sb->s_d_op = &exfat_ci_dentry_ops;
+ else
+ sb->s_d_op = &exfat_dentry_ops;
+}
+#endif
+
+static int exfat_fill_super(struct super_block *sb, void *data, int silent)
+{
+ struct inode *root_inode = NULL;
+ struct exfat_sb_info *sbi;
+ int debug, ret;
+ long error;
+ char buf[50];
+
+ /*
+ * GFP_KERNEL is ok here, because while we do hold the
+ * supeblock lock, memory pressure can't call back into
+ * the filesystem, since we're only just about to mount
+ * it and have no inodes etc active!
+ */
+ sbi = kzalloc(sizeof(struct exfat_sb_info), GFP_KERNEL);
+ if (!sbi)
+ return -ENOMEM;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,0)
+ mutex_init(&sbi->s_lock);
+#endif
+ sb->s_fs_info = sbi;
+ sb->s_flags |= MS_NODIRATIME;
+ sb->s_magic = EXFAT_SUPER_MAGIC;
+ sb->s_op = &exfat_sops;
+
+ error = parse_options(data, silent, &debug, &sbi->options);
+ if (error)
+ goto out_fail;
+
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,37)
+ setup_dops(sb);
+#endif
+
+ error = -EIO;
+ sb_min_blocksize(sb, 512);
+ sb->s_maxbytes = 0x7fffffffffffffffLL; /* maximum file size */
+
+ ret = FsMountVol(sb);
+ if (ret) {
+ if (!silent)
+ printk(KERN_ERR "[EXFAT] FsMountVol failed\n");
+
+ goto out_fail;
+ }
+
+ /* set up enough so that it can read an inode */
+ exfat_hash_init(sb);
+
+ /*
+ * The low byte of FAT's first entry must have same value with
+ * media-field. But in real world, too many devices is
+ * writing wrong value. So, removed that validity check.
+ *
+ * if (FAT_FIRST_ENT(sb, media) != first)
+ */
+
+ /* codepage is not meaningful in exfat */
+ if (sbi->fs_info.vol_type != EXFAT) {
+ error = -EINVAL;
+ sprintf(buf, "cp%d", sbi->options.codepage);
+ sbi->nls_disk = load_nls(buf);
+ if (!sbi->nls_disk) {
+ printk(KERN_ERR "[EXFAT] Codepage %s not found\n", buf);
+ goto out_fail2;
+ }
+ }
+
+ sbi->nls_io = load_nls(sbi->options.iocharset);
+
+ error = -ENOMEM;
+ root_inode = new_inode(sb);
+ if (!root_inode)
+ goto out_fail2;
+ root_inode->i_ino = EXFAT_ROOT_INO;
+ root_inode->i_version = 1;
+ error = exfat_read_root(root_inode);
+ if (error < 0)
+ goto out_fail2;
+ error = -ENOMEM;
+ exfat_attach(root_inode, EXFAT_I(root_inode)->i_pos);
+ insert_inode_hash(root_inode);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,00)
+ sb->s_root = d_make_root(root_inode);
+#else
+ sb->s_root = d_alloc_root(root_inode);
+#endif
+ if (!sb->s_root) {
+ printk(KERN_ERR "[EXFAT] Getting the root inode failed\n");
+ goto out_fail2;
+ }
+
+ return 0;
+
+out_fail2:
+ FsUmountVol(sb);
+out_fail:
+ if (root_inode)
+ iput(root_inode);
+ sb->s_fs_info = NULL;
+ exfat_free_super(sbi);
+ return error;
+}
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37)
+static int exfat_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
+ void *data, struct vfsmount *mnt)
+{
+ return get_sb_bdev(fs_type, flags, dev_name, data, exfat_fill_super, mnt);
+}
+#else
+static struct dentry *exfat_fs_mount(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
+ void *data) {
+ return mount_bdev(fs_type, flags, dev_name, data, exfat_fill_super);
+}
+#endif
+
+static void init_once(void *foo)
+{
+ struct exfat_inode_info *ei = (struct exfat_inode_info *)foo;
+
+ INIT_HLIST_NODE(&ei->i_hash_fat);
+ inode_init_once(&ei->vfs_inode);
+}
+
+static int __init exfat_init_inodecache(void)
+{
+ exfat_inode_cachep = kmem_cache_create("exfat_inode_cache",
+ sizeof(struct exfat_inode_info),
+ 0, (SLAB_RECLAIM_ACCOUNT|
+ SLAB_MEM_SPREAD),
+ init_once);
+ if (exfat_inode_cachep == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+static void __exit exfat_destroy_inodecache(void)
+{
+ kmem_cache_destroy(exfat_inode_cachep);
+}
+
+#ifdef CONFIG_EXFAT_KERNEL_DEBUG
+static void exfat_debug_kill_sb(struct super_block *sb)
+{
+ struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ struct block_device *bdev = sb->s_bdev;
+
+ long flags;
+
+ if (sbi) {
+ flags = sbi->debug_flags;
+
+ if (flags & EXFAT_DEBUGFLAGS_INVALID_UMOUNT) {
+ /* invalidate_bdev drops all device cache include dirty.
+ we use this to simulate device removal */
+ FsReleaseCache(sb);
+ invalidate_bdev(bdev);
+ }
+ }
+
+ kill_block_super(sb);
+}
+#endif /* CONFIG_EXFAT_KERNEL_DEBUG */
+
+static struct file_system_type exfat_fs_type = {
+ .owner = THIS_MODULE,
+#if defined(CONFIG_MACH_LGE) || defined(CONFIG_HTC_BATT_CORE)
+ .name = "texfat",
+#else
+ .name = "exfat",
+#endif
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37)
+ .get_sb = exfat_get_sb,
+#else
+ .mount = exfat_fs_mount,
+#endif
+#ifdef CONFIG_EXFAT_KERNEL_DEBUG
+ .kill_sb = exfat_debug_kill_sb,
+#else
+ .kill_sb = kill_block_super,
+#endif /* CONFIG_EXFAT_KERNEL_DEBUG */
+ .fs_flags = FS_REQUIRES_DEV,
+};
+
+static int __init init_exfat(void)
+{
+ int err;
+
+ err = FsInit();
+ if (err) {
+ if (err == FFS_MEMORYERR)
+ return -ENOMEM;
+ else
+ return -EIO;
+ }
+
+ printk(KERN_INFO "exFAT: Version %s\n", EXFAT_VERSION);
+
+ err = exfat_init_inodecache();
+ if (err)
+ goto out;
+
+ err = register_filesystem(&exfat_fs_type);
+ if (err)
+ goto out;
+
+ return 0;
+out:
+ FsShutdown();
+ return err;
+}
+
+static void __exit exit_exfat(void)
+{
+ exfat_destroy_inodecache();
+ unregister_filesystem(&exfat_fs_type);
+ FsShutdown();
+}
+
+module_init(init_exfat);
+module_exit(exit_exfat);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("exFAT Filesystem Driver");
+#ifdef MODULE_ALIAS_FS
+#if defined(CONFIG_MACH_LGE) || defined(CONFIG_HTC_BATT_CORE)
+MODULE_ALIAS_FS("texfat");
+#else
+MODULE_ALIAS_FS("exfat");
+#endif
+#endif